main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem;
}

main h1 {
  font-size: 3rem;
  font-weight: bold;
  margin-bottom: 2rem;
  text-align: center;
  color: var(--kosen-blue);
}

main h2 {
  font-size: 2.5rem;
  font-weight: bold;
  margin-top: 3rem;
  margin-bottom: 2rem;
  color: var(--kosen-orange);
  border-bottom: 3px solid var(--border);
  padding-bottom: 0.5rem;
}

main h3 {
  font-size: 2rem;
  font-weight: 600;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--foreground);
}

main h4 {
  font-size: 1.25rem;
  margin-top: 1.5rem;
  margin-bottom: 1rem;
}

main h4 a {
  color: var(--kosen-blue);
  text-decoration: none;
  transition: color 0.2s ease;
}

main h4 a:hover {
  color: var(--kosen-orange);
  text-decoration: underline;
}

main p {
  font-size: 1.125rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  text-align: justify;
  color: var(--foreground);
}

main b {
  display: block;
  font-size: 1.25rem;
  font-weight: bold;
  margin-top: 2rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

main img {
  width: 100%;
  max-width: 650px;
  height: auto;
  border-radius: var(--radius);
  border: 2px solid var(--border);
  margin: 1rem auto;
  display: block;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}

main img:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 12px rgba(0, 0, 0, 0.15);
}

main br {
  margin: 1rem 0;
}

main > a {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  margin-top: 2rem;
  background-color: var(--card);
  color: var(--kosen-blue);
  text-decoration: none;
  border-radius: var(--radius);
  border: 2px solid var(--kosen-blue);
  font-weight: bold;
  transition: all 0.2s ease;
}

main > a:hover {
  background-color: var(--kosen-blue);
  color: var(--primary-foreground);
  transform: translateX(-4px);
}

/* Responsive design */
@media (max-width: 768px) {
  main {
    padding: 1rem;
  }

  main h1 {
    font-size: 2rem;
  }

  main h2 {
    font-size: 1.75rem;
    margin-top: 2rem;
  }

  main h3 {
    font-size: 1.5rem;
  }

  main h4 {
    font-size: 1.125rem;
  }

  main p {
    font-size: 1rem;
    text-align: left;
  }

  main b {
    font-size: 1.125rem;
  }

  main img {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  main {
    padding: 0.75rem;
  }

  main h1 {
    font-size: 1.75rem;
  }

  main h2 {
    font-size: 1.5rem;
    margin-top: 1.5rem;
  }

  main h3 {
    font-size: 1.25rem;
  }

  main h4 {
    font-size: 1rem;
  }

  main p {
    font-size: 0.9375rem;
  }

  main b {
    font-size: 1rem;
  }

  main > a {
    padding: 0.625rem 1.25rem;
    font-size: 0.9375rem;
  }
}